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Статті в журналах з теми "Geological bar"

Автор: Grafiati

Опубліковано: 8 листопада 2023

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1

Luo, Chao, Ailin Jia, Jianlin Guo, et al. "Modeling of dense well block point bar architecture based on geological vector information: A case study of the third member of Quantou Formation in Songliao Basin." Open Geosciences 13, no. 1 (2021): 39–48. http://dx.doi.org/10.1515/geo-2020-0222.

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Abstract Although stochastic modeling methods can achieve multiple implementations of sedimentary microfacies model in dense well blocks, it is difficult to realize continuous convergence of well spacing. Taking the small high-sinuosity meandering river sediments of the third member of Quantou Formation in Songliao Basin as an example, a deterministic modeling method based on geological vector information was explored in this article. Quantitative geological characteristics of point bar sediments were analyzed by field outcrops, modern sediments, and dense well block anatomy. The lateral exten

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2

Sinaga, Goldberd Harmuda Duva, Agoez Loeqman, Ruben Cornelius Siagian, and Mardame Pangihutan Sinaga. "Analysis of Coulomb Stress Changes in Aceh Earthquake on Sibayak Volcano." Jurnal Pendidikan Fisika dan Teknologi 8, no. 2 (2022): 217–27. http://dx.doi.org/10.29303/jpft.v8i2.4409.

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Based on geological conditions, Indonesia is located between the Indo-Australian plate, the Eurasian plate, and the Pacific plate, making Indonesia prone to tectonic earthquakes. However, since the big earthquake that occurred in Aceh on December 26, 2004, the geological conditions in Sumatra have undergone significant changes marked by stressful situations in the western to southern regions of Sumatra, especially on Sibayak Volcano. This study used data from BMKG and Global CMT, which included magnitude (Mw), depth, earthquake coordinates (longitude and latitude), type of earthquake, strike,

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3

Neuhoff, P. S., and D. K. Bird. "Partial dehydration of laumontite: thermodynamic constraints and petrogenetic implications." Mineralogical Magazine 65, no. 1 (2001): 59–70. http://dx.doi.org/10.1180/002646101550127.

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AbstractLaumontite is a common zeolite mineral indicative of low-grade metamorphism of lavas and volcaniclastic sediments. Stoichiometric laumontite (CaAl2Si4O12·4.5H2O) dehydrates in air at 298.15 K, 1 bar to leonhardite (CaAl2Si4O12·3.5H2O) via loss of water from the W1 crystallographic site. Consideration of reported X-ray diffraction and calorimetric data indicates that the standard molal volume and entropy for dehydration of laumontite to leonhardite + liquid water are ∼13 cc/mol and ∼8 cal/molK, respectively, at 298.15 K, 1 bar. Equilibrium between laumontite and leonhardite occurs at 70

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4

Qi, Ren Li, Kai Yuan Chen, Bo Niu, and Zhan Tao Xing. "The Depositional System of Dongying Formation and Subtle Reservoir Exploration in Sha’nan Structural Belt Qikou Sag of Bohai Bay Basin, China." Advanced Materials Research 616-618 (December 2012): 32–37. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.32.

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The subtle reservoir has become an important exploration target within the Bohai Bay Basin, especially in the Qikou sag. In order to guide subtle reservoirs exploration in offshore area geological analysis to Sha’nan structural belt is carried out in this paper. Qikou sag has large thickness, high abundance, ideal type hydrocarbon source rock. By unconformity recognition technique and paleotectonic analysis technique, results show that tectonic uplift had provided sedimentary source to the depression around it after Es1. By 3-D seismic interpretation technique and Seismic facies analysis, the

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5

Lee, J. B., P. R. Osborne, J. C. Williams, and A. S. Woodyatt. "Airborne spectral sensing of hydrothermal alteration minerals." Exploration Geophysics 20, no. 2 (1989): 81. http://dx.doi.org/10.1071/eg989081.

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Remote sensing infrared spectrometer data were collected with the Geophysical and Environmental Research Corp. 64 channel scanning spectrometer. These have been used to delineate geological units and, subject to some ambiguity, identify their mineralogy. Results are given for a survey area near Coppin Gap in the Pilbara region of Western Australia. Here, clear distinction was obtained between the sericite mineralogy of the Hardey Sandstone and some members of the Marble Bar belt, and the carbonate or epidote/chlorite mineralogy of the Kylena Basalt and other units in the Marble Bar belt.From t

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6

Tong, Rui Ming, Xian Long Lu, and Wei Feng Zheng. "Experiment Study on Bolts Foundation of Large-Jointed Rock Mass in Transmission Lines." Applied Mechanics and Materials 256-259 (December 2012): 344–49. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.344.

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Large-jointed rock mass is the main geological condition of transmission lines of Qingyuan Regions in Guangdong Province. The bolt foundations haven’t be studied and applied in this geological condition. Static load tests of 15 single-bolt foundations and 8 group-bolt foundations were carried out. Experiment study shows that the mechanical characteristics of bolt foundation are suitable for transmission lines in large-jointed rock mass. The design parameters of anchor bar in large-jointed rock mass are derived from the measured data:τa>2359kPa, τb>618kPa, τc>42kPa.

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7

Aleksandrov, Vadim, Marsel Kadyrov, Andrey Ponomarev, Kirill Galinskij, and Sergey Aleksandrov. "Genetic Zoning of the YUV₁ Productive Horizon Deposits within the Tagrinsko-Yarainersky Bar." Key Engineering Materials 785 (October 2018): 140–45. http://dx.doi.org/10.4028/www.scientific.net/kem.785.140.

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The developed litho-sedimentological model of deposits of the YUV1productive horizon makes it possible to choose the most effective technique for supplementary exploration of a natural reservoir and improve the quality of geological justification for its subsequent development. The research objective is to carry out paleogeographic and paleostructural reconstructions, to identify facies complexes in the Upper Jurassic productive deposits, and to identify zones for the development of improved reservoir units. With the help of paleogeographic and facies methods, the geological regularities of th

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8

Li, Wanbing, Shaohua Li, Quangong Qu, Huafeng Zhang, Junying Zhao, and Mengjiao Dou. "A Modeling Approach for Beach-Bar Sand Reservoirs Based on Depositional Mode and Sandbody Volume." Minerals 12, no. 8 (2022): 950. http://dx.doi.org/10.3390/min12080950.

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Beach-bar sand in lacustrine facies represents one of the most significant reservoirs. Depending on the depositional characteristics, it can be further divided into two different sedimentary microfacies, beach sand and the bar sand. Favorable reservoirs are often developed in bar sand. The lower section of the upper part of the 4th member of the Shahejie Formation in the Gao89-1 block is a typical nearshore shallow water beach-bar deposit. Oil distribution is influenced by lithofacies and physical properties. In order to better characterize the heterogeneity within beach-bar sandbodies, a mode

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9

Li, Jun Jie, Yuan Fu Zhang, and Guo Guo Liu. "Sedimentary Research of Block8 in Jinglou Oilfield." Advanced Materials Research 1010-1012 (August 2014): 1435–39. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1435.

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By core observation and logging in Block8, Jinglou oilfield, we distinguished the sedimentary structure characteristics and the logs’ features of subaqueous distributary channel, mouth bar, sheet sand and interdistributary. Then we promoted it in the whole region, and characterised the sedimentary faices of every layers. So we provide a reliable geological basis for progressive development in research area.

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10

Bohloli, Bahman. "Effects of the geological parameters on rock blasting using the Hopkinson split bar." International Journal of Rock Mechanics and Mining Sciences 34, no. 3-4 (1997): 32.e1–32.e9. http://dx.doi.org/10.1016/s1365-1609(97)00228-1.

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11

Pfennig, Anja, and Axel Kranzmann. "Understanding the Anomalous Corrosion Behaviour of 17% Chromium Martensitic Stainless Steel in Laboratory CCS-Environment—A Descriptive Approach." Clean Technologies 4, no. 2 (2022): 239–57. http://dx.doi.org/10.3390/cleantechnol4020014.

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To mitigate carbon dioxide emissions CO2 is compressed and sequestrated into deep geological layers (Carbon Capture and Storage CCS). The corrosion of injection pipe steels is induced when the metal is in contact with CO2 and at the same time the geological saline formation water. Stainless steels X35CrMo17 and X5CrNiCuNb16-4 with approximately 17% Cr show potential as injection pipes to engineer the Northern German Basin geological onshore CCS-site. Static laboratory experiments (T = 60 °C, p = 100 bar, 700–8000 h exposure time, aquifer water, CO2-flow rate of 9 L/h) were conducted to evaluat

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12

Friday, Uhuo, Kenneth, Okoro, Anthony U., Igwe Ezekiel O., and Ukandu James S. "ANALYSIS OF DEPOSITIONAL ENVIRONMENTS OF UK FIELD RESERVOIR SANDS IN NIGER DELTA BASIN, NIGERIA." American Journal of Applied sciences 04, no. 12 (2022): 05–32. http://dx.doi.org/10.37547/tajas/volume04issue12-02.

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The environments of deposition play a vital role during hydrocarbon formation, migration, trapping and storage. Since the reservoir rocks are a function of their depositional environments, the successful tapping of hydrocarbon from its host rock when wells are drilled depends largely on the petrophysical characteristics of the reservoir rocks which in turn originated from and are influenced by their depositional environment. The reservoir facies in Niger Delta shows a broad range of characteristic sedimentological complexities that gave rise to subsurface geological, drilling and production pr

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13

Paudyal, Kabiraj. "Occurrences of mineral resources in Bandipur Gondrang area of Tanahun district, central Nepal, Lesser Himalaya." Journal of Science and Engineering 2 (January 30, 2014): 24–35. http://dx.doi.org/10.3126/jsce.v2i0.22484.

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A detailed geological investigation was carried out to assess the distribution of minerals and their geological control in Bandipur-Gondrang area of Tanahu district, a part of Lesser Himalaya in central Nepal. The area is found rich in both metallic and non-metallic mineral deposits. The main metallic minerals found are iron in Phalamdada and Labdi Khola, copper in Bhut Khola and poly-metallic deposits including suspected gold in Bhangeri Khola and Jaubari Khola-Bar Khola sections. A large deposit of inorganic carbon is found around the Gondrang-Watak area. Similarly, a good quality of green m

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14

Prokofiev, Vsevolod Yu, and Vladimir B. Naumov. "Physicochemical Parameters and Geochemical Features of Ore-Forming Fluids for Orogenic Gold Deposits Throughout Geological Time." Minerals 10, no. 1 (2020): 50. http://dx.doi.org/10.3390/min10010050.

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This paper reviews data from numerous publications focused on the physicochemical parameters and chemical composition of ore-forming fluids from orogenic gold deposits formed during various geological epochs. The paper presents analysis of the distribution of the principal parameters of mineralizing fluids depending on the age of the mineralization. Some parameters of the fluids (their salinity and pressure) at orogenic gold deposits are demonstrated to systematically vary from older (median salinity 6.1 wt.%, median pressure 1680 bar) to younger (median salinity 3.6 wt.%, median pressure 1305

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15

Liu, Peng, Zude Ding, Wanping Zhang, Zhihua Ren, and Xuxiang Yang. "Using Ground-Penetrating Radar and Deep Learning to Rapidly Detect Voids and Rebar Defects in Linings." Sustainability 15, no. 15 (2023): 11855. http://dx.doi.org/10.3390/su151511855.

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The geological radar method has found widespread use in evaluating the quality of tunnel lining. However, relying on manual experience to interpret geological radar data may cause identification errors and reduce efficiency when dealing with large numbers of data. This paper proposes a method for identifying internal quality defects in tunnel lining using deep learning and transfer learning techniques. An experimental physical model for detecting the quality of tunnel lining radars was developed to identify the typical radar image features of internal quality defects. Using the geological rada

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16

Lesparre, N., J. Marteau, Y. Déclais, et al. "Design and operation of a field telescope for cosmic ray geophysical tomography." Geoscientific Instrumentation, Methods and Data Systems 1, no. 1 (2012): 33–42. http://dx.doi.org/10.5194/gi-1-33-2012.

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Abstract. The cosmic ray muon tomography gives an access to the density structure of geological targets. In the present article we describe a muon telescope adapted to harsh environmental conditions. In particular the design optimizes the total weight and power consumption to ease the deployment and increase the autonomy of the detector. The muon telescopes consist of at least two scintillator detection matrices readout by photosensors via optical fibres. Two photosensor options have been studied. The baseline option foresees one multianode photomultiplier (MAPM) per matrix. A second option us

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17

La Felice, Sonia, Tsegaye Abebe, Andrea Aquino, Simone Landi, Marco Lezzerini, and Claudia Principe. "Geological and Cultural Heritage: Dissemination Experiences in Tuscany." Heritage 2, no. 3 (2019): 2171–82. http://dx.doi.org/10.3390/heritage2030131.

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We report on some recent experiences of scientific dissemination activities on geomaterials carried out by a network of scientific organizations in Tuscany (Italy). The primary message we want to disseminate is that even the most “insignificant” rock (e.g., those constituting the bar or kitchen counter-tops) stores in their interior very useful information beyond the beautiful colors and their aesthetic appearance. These rocks can tell stories of very old geological periods on how they were formed. Their structures, texture and shape, as well as their chemistry and mineralogy provide clues to

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18

Lemenkov, Vasiliy, and Polina Lemenkova. "Using TeX Markup Language for 3D and 2D Geological Plotting." Foundations of Computing and Decision Sciences 46, no. 1 (2021): 43–69. http://dx.doi.org/10.2478/fcds-2021-0004.

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Abstract The paper presents technical application of TeX high-level, descriptive markup language for processing geological dataset from soil laboratory. Geotechnical measurements included equivalent soil cohesion, absolute and absolute deformation index, soil compressibility coefficient by time of immersion depth, exposure time to compressive strength to samples and physical and mechanical properties (humidity, density). Dataset was received from laboratory based experimental tests of the physical and mechanical properties of soils. Data were converted to csv table and processed by LaTeX. Meth

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19

Guo, Wei, Chunmei Dong, Chengyan Lin, Tao Zhang, Zhongxiang Zhao, and Jia Li. "3D Sedimentary Architecture of Sandy Braided River, Based on Outcrop, Unmanned Aerial Vehicle and Ground Penetrating Radar Data." Minerals 12, no. 6 (2022): 739. http://dx.doi.org/10.3390/min12060739.

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Ground Penetrating Radar (GPR) is a geophysical method that uses antennas to transmit and receive high-frequency electromagnetic waves to detect the properties and distribution of materials in media. In this paper, geological observation, UAV detection and GPR technology are combined to study the recent sediments of the Yungang braided river study area in Datong. The application of the GPR technique to the description of fluvial facies and reservoir architecture and the development of geological models are discussed. The process of GPR detection technology and application includes three parts:

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20

Rios Soberanis, Carlos Rolando, Victor Jose Ley Paredes, Emilio Perez Pacheco, Carlos Emilio Vinajera Reyna, Shuichi Wakayama, and Takenobu Sakai. "Experimental studies on the mechanical behavior of Mayan archeological rocks." DYNA 86, no. 208 (2019): 227–33. http://dx.doi.org/10.15446/dyna.v86n208.73581.

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Mayan buildings have been the subject of significant archaeological and architectural research; however, so far there have been no relevant references concerning structural or mechanical behavior. Ancient Mayan constructors used calcareous rocks to build temples and housing that were placed systematically to withstand mechanical loads in the structures. This paper studies the mineralogical and mechanical characteristics of calcareous stony material that formed part of Mayan archeological vestiges in Yucatan area. The orientation of the rocks´ geological strata was taken into account to study m

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21

Jendruś, Rafał, Arkadiusz Stawiarski, Grzegorz Pach, and Piotr Pierzyna. "Static Survey as Geological Engineering Method Verification of DSM Column Formation." Geosciences 10, no. 6 (2020): 216. http://dx.doi.org/10.3390/geosciences10060216.

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The state-of-the-art methods for verifying the correctness of ground improvement performed using the DSM (Deep Soil Mixing) technology are largely focused on the selection of adequate factors impacting the achievement of a correct compressive strength fc [MPa] of the column core, which ensures the transfer of stress from the designed structures to the subsoil. In view of the operation of each of the columns, it is equally significant to ensure that their bases are located in load-bearing soil at the entire area of the improvement, without the need to perform many costly subsoil surveys. Based

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22

Guo, Qiang, Da Kang Zhong, Yu Lin Wang, and Yan Chun Zhong. "Characteristics of Petroleum Geology and Prediction of Favorable Areas in Jiufotang Formation, Kazuo Basin." Advanced Materials Research 361-363 (October 2011): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.3.

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Through the research on actual measurement 106km geological profile, the hydrocarbon source rocks mainly develop the third member of Jiufotang formation, followed by the second member. There are five distribution areas where have been divided hydrocarbon source rocks thickness is more than 400m in study area. Among them, Jiufotang area has the greatest sedimentary thickness of hydrocarbon source rocks, while Siguanyingzi-Sanjiazi area has the largest area where hydrocarbon source rocks are more than 400m. Oil shale is good hydrocarbon source rock, while dark gray and black gray mudstone (or sh

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23

Zhang, Yue, You-liang Ji, Hui-jian Wen, et al. "Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield." Geofluids 2020 (February 14, 2020): 1–20. http://dx.doi.org/10.1155/2020/5707250.

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To analyze the effect of various flow units in a channel sand body on remnant oil, we established a connection between various flow unit types and the remnant oil distribution. Using stratigraphic correlation and the characterization of sedimentary microfacies, we describe a single sand body, point bar, and narrow channel located at the injection-production well pattern of well B2-60-FB271 in the Eastern transition zone of the Daqing Placanticline. Architecture models of the point bar and narrow channel are also established using a series of parameters from different measurement methods. Four

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24

Ni, Chun Zhong, and Dong Wang. "Application of Geophysical Exploration Results in Prospecting Prediction at Xiayingfang Silver Polymetallic Deposit in Chengde, Hebei Province." Applied Mechanics and Materials 405-408 (September 2013): 607–10. http://dx.doi.org/10.4028/www.scientific.net/amm.405-408.607.

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Xiayingfang mining area in the structure of the earth is part of north China platform of Inner Mongolia axis and yanshan fold belt, which belong to the northern margin of north China platform polymetallic metallogenic belt. Give priority to with silver polymetallic minerals, in the area are mainly distributed at Xiayingfang - Dongshan fault belt and its two side. Ore bodies occur mainly in group a bar at the bottom of the Tuanshanzi group banded dolomite and dolomitic limestone. After analyzing the characteristics of geophysical prospecting in the area, combined with the study of geological co

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25

Lang, S. C., J. Kassan, J. M. Benson, C. A. Grasso, and L. C. Avenell. "APPLICATIONS OF MODERN AND ANCIENT GEOLOGICAL ANALOGUES IN CHARACTERISATION OF FLUVIAL AND FLUVIAL-LACUSTRINE DELTAIC RESERVOIRS IN THE COOPER BASIN." APPEA Journal 40, no. 1 (2000): 393. http://dx.doi.org/10.1071/aj99023.

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Reservoir characterisation in fluvial and fluvial- lacustrine delta successions is enhanced by the use of appropriate modern and ancient analogues to understand subsurface reservoir architecture and to help build appropriately scaled reservoir models. Two case studies of reservoir characterisation in the Cooper Basin are used to illustrate the value of analogues. Firstly the Late Permian Toolachee Formation crevasse splay reservoirs of the Cooper Basin, southwest Queensland are outlined, and analogues from the Ob River in Western Siberia illustrate the relative scale of crevasse splay deposits

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26

Murray, John. "Editorial." Journal of Micropalaeontology 13, no. 1 (1994): 1. http://dx.doi.org/10.1144/jm.13.1.1.

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Abstract. The Journal of Micropalaeontology is now well-established as an international publication covering all aspects of microfossils and their applications both in applied studies and in basic research. This has been brought about through the unstinting efforts of the two previous editors, Lesley Sheppard (1982-87) and Mike Keen (1988-94), and their supporting Editorial Boards. Last autumn, the officers of the Society decided that with the appointment of a new editor, the journal should be published through the Geological Society Publishing House. Since becoming Editor in March, my first t

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27

Mala, Harti Umbu, and Juliany N. Mohamad. "Arah Penyebaran Stress Coulomb pada Batuan akibat Gempabumi Kairatu 26 September 2019." Wahana Fisika 5, no. 1 (2020): 62–70. http://dx.doi.org/10.17509/wafi.v5i1.24500.

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Penelitian ini bertujuan untuk mengetahui arah penyebaran stress batuan yang diakibatkan oleh gempabumi Kairatu dan diduga memiliki keterkaitan dengan kejadian gempabumi yang terjadi setelahnya. Penelitin ini menggunakan data kejadian gempabumi yang diperoleh dari katalog United State Geological Survey (USGS) dan Badan Meteorologi, Klimantologi, dan Geofisika (BMKG) pada tanggal 26 September 2019 dan setelahnya. Adapun metode yang digunakan adalah metode perubahan Coulomb stress menggunakan software Coulomb 3.3. Hasil analisis, menunjukkan bahwa gempabumi Kairatu memiliki mekanisme sumber yakn

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28

Dou, Mengjiao, Shaohua Li, Tao Lei, et al. "Hierarchical Multiple-Point Geostatistical Modeling Method and Application Based on Braided River Reservoir Architecture." Minerals 12, no. 11 (2022): 1398. http://dx.doi.org/10.3390/min12111398.

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The Lower Shihezi Formation of the Daniudi gas field in the Ordos Basin is a typical reservoir of a braided river system in an alluvial plain, characterized by extensive braided river development, parallel development from the near source to the center of the basin, and frequent interweaving and cut stacking, as well as a complex deposition process that has seen frequent river channel changes. The braided river belt, braided channel, channel bar inside the river, and interlayer within the channel bar constitute a hierarchical and complicated architectural feature, which poses a great challenge

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29

SHANG, Xiaofei, Taizhong DUAN, Jiagen HOU, and Yan LI. "Spatial configuration of sand and mud in the lacustrine nearshore sand bar deposits and its geological implications." Petroleum Exploration and Development 46, no. 5 (2019): 954–68. http://dx.doi.org/10.1016/s1876-3804(19)60252-1.

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30

Cheng, Y. M., S. K. Au, and Albert T. Yeung. "Laboratory and field evaluation of several types of soil nails for different geological conditions." Canadian Geotechnical Journal 53, no. 4 (2016): 634–45. http://dx.doi.org/10.1139/cgj-2015-0267.

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For steep slopes with difficult access or slopes in a corrosive environment, there are various problems associated with the use of conventional steel reinforcement bars as soil nails. For loose-fill slopes or clay slopes, the development of adequate nail bond strength is another practical issue that should be considered. Carbon fiber–reinforced polymer (CFRP) and glass fiber–reinforced polymer (GFRP) in several forms and installation methods have been studied as the alternatives to the classical steel bar. Extensive laboratory tests on the materials and field tests on different types of soil n

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31

Chen, Pan Pan, Jun Xie, Cun Lei Li, Meng Qi Wang, Yi Dan Liu, and Bai Chuan Li. "Application of Facies-Controlled Physical Property Modeling in Oubei Block, Jinhu Depression." Applied Mechanics and Materials 522-524 (February 2014): 1359–62. http://dx.doi.org/10.4028/www.scientific.net/amm.522-524.1359.

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Анотація:

Three dimensional (3D) models provide insights into the distribution, external and internal geometry of the reservoirs. The core description shows that the fourth segment of Funing Formation (E1f4), Oubei Block, Jinhu Depression mainly develop delta front subfacies which included underwater distributary channel, mouth bar, sand sheet and so on. Well data and structural maps were integrated to build 3D structure model and sedimentary microfacies model of Oubei reservoirs using stochastic simulations with geometry data. The result of facies-controlled property model can reasonably reflect reserv

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32

Bielka, Paweł, Szymon Kuczyński, and Stanisław Nagy. "CO2 Compression and Dehydration for Transport and Geological Storage." Energies 16, no. 4 (2023): 1804. http://dx.doi.org/10.3390/en16041804.

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Observation of the greenhouse effect prompts the consideration of every possibility of reducing anthropogenic carbon dioxide emissions. One of the key methods that has been the subject of much research is Carbon Dioxide Capture and Storage. The purpose of this study was to investigate the main technologies of CO2 capture, separation, and dehydration as well as methods of its transport and methodology of selecting a suitable geological storage site. An installation of dehydration and compression of carbon dioxide captured after the post-combustion was designed at a temperature of 35 °C, a press

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33

Martín, Domingo, Patricia Aparicio, Susana García, and María Mercedes Maroto-Valer. "Mixed-Layer Illite-Smectite Illitization under Supercritical CO2 Conditions." Applied Sciences 12, no. 22 (2022): 11477. http://dx.doi.org/10.3390/app122211477.

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The long-term safe storage of CO2 in geological reservoirs requires the understanding of the impact of CO2 on clay-rich sealing cap rocks. The reactivity of the mixed layer of illite-smectite was investigated to determine the reaction pathways under conditions of supercritical CO2 (scCO2) conditions in the context of geological CO2 storage. A common clay (blue marl from the Guadalquivir Tertiary basin, southern Spain) was tested under brine scCO2 conditions (100 bar and 35 °C) for 120 and 240 h. The clay sample (blue marl) contains calcite, quartz, illite, smectite, and the corresponding mixed

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34

Nakagawa, Seiji. "Split Hopkinson resonant bar test for sonic-frequency acoustic velocity and attenuation measurements of small, isotropic geological samples." Review of Scientific Instruments 82, no. 4 (2011): 044901. http://dx.doi.org/10.1063/1.3579501.

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35

Cachoir, Christelle, Thierry Mennecart, and Karel Lemmens. "Evolution of the uranium concentration in dissolution experiments with Cr-(Pu) doped UO2 in reducing conditions at SCK CEN." MRS Advances 6, no. 4-5 (2021): 84–89. http://dx.doi.org/10.1557/s43580-021-00027-y.

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Анотація:

AbstractCr-doped UO2-based model materials were prepared at SCK CEN, mimicking modern LWR fuels, to understand the influence of Cr doping on the spent fuel dissolution behaviour in geological repository conditions. Tests were carried out with four model materials: depleted UO2, Cr-doped depleted UO2, Pu-doped UO2 and Pu-Cr-doped UO2. Static dissolution experiments have been performed up to 4 months in autoclaves under 10 bar H2 pressure with a Pt/Pd catalyst in media at pH 13.5 and at pH 9. The Cr-doping appeared to reduce the U concentrations by a factor 6 at pH 13.5, but it had no or not muc

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36

Hong, Dae Sun, Do Un Kim, Hyo Jeong Kang, Sang Wook Hwang, and Sang Sik Lee. "Finite Element Analysis on a 250 kN.m-Type Rotary Drilling Rig for Foundation of Geological Construction." Key Engineering Materials 516 (June 2012): 545–50. http://dx.doi.org/10.4028/www.scientific.net/kem.516.545.

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Rotary drilling rigs, general construction equipment, are widely used for deep drilling of ground for the foundations of public works. A new 250kN.m-type rotary drilling rig, most widely used in this field, is under development, and this study focuses on the operational safety of the mast subassembly on the basis of structure analysis of the mast subassembly using a finite element method with ANSYS. When using a drilling rig, an electric rotary drive supplies power for drilling. Here, the elevation of the rotary drive along the mast needs to be changed according to the geological construction

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37

Redding, J. H. "Route selection for natural gas pipelines in Ireland." Geological Society, London, Engineering Geology Special Publications 4, no. 1 (1987): 467–74. http://dx.doi.org/10.1144/gsl.eng.1987.004.01.56.

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AbstractBy the end of 1986, over 400 km of high pressure (70 bar) natural gas pipeline will have been constructed in the Irish Republic, much of it laid in sparsely populated rural areas where topography, hydrology, near surface geology and ground conditions can significantly influence construction feasibility and cost. Identifying, quantifying and (where possible) avoiding areas of potential difficulty or hazard are aspects of route selection to which engineering geology can make an important contribution. This contribution is discussed in relation to the Cork-Dublin pipeline completed in 198

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38

Pandey, Jyoti Shanker, Yousef Jouljamal Daas, Adam Paul Karcz, and Nicolas von Solms. "Enhanced Hydrate-Based Geological CO2 Capture and Sequestration as a Mitigation Strategy to Address Climate Change." Energies 13, no. 21 (2020): 5661. http://dx.doi.org/10.3390/en13215661.

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Анотація:

Geological sequestration of CO2-rich gas as a CO2 capture and storage technique has a lower technical and cost barrier compared to industrial scale-up. In this study, we have proposed CO2 capture and storage via hydrate in geological formation within the hydrate stability zone as a novel technique to contribute to global warming mitigation strategies, including carbon capture, utilization, and storage (CCUS) and to prevent vast methane release into the atmosphere caused by hydrate melting. We have attempted to enhance total gas uptake and CO2 capture efficiency in hydrate in the presence of ki

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39

Lesparre, N., J. Marteau, Y. Déclais, et al. "Design and operation of a field telescope for cosmic ray geophysical tomography." Geoscientific Instrumentation, Methods and Data Systems Discussions 1, no. 1 (2011): 47–89. http://dx.doi.org/10.5194/gid-1-47-2011.

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Abstract. The cosmic ray muon tomography gives an access to the density structure of geological targets. In the present article we describe a muon telescope adapted to harsh environmental conditions. In particular the design optimizes the total weight and power consumption to ease the deployment and increase the autonomy of the detector. The muon telescopes consist of at least two scintillator detection matrices readout by photosensors via optical fibres. Two photosensor options have been studied. The baseline option foresees one multianode photomultiplier (MAPM) per matrix. A second option us

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40

Linde, N., J. Doetsch, D. Jougnot, et al. "Self-potential investigations of a gravel bar in a restored river corridor." Hydrology and Earth System Sciences 15, no. 3 (2011): 729–42. http://dx.doi.org/10.5194/hess-15-729-2011.

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Abstract. Self-potentials (SP) are sensitive to water fluxes and concentration gradients in both saturated and unsaturated geological media, but quantitative interpretations of SP field data may often be hindered by the superposition of different source contributions and time-varying electrode potentials. Self-potential mapping and close to two months of SP monitoring on a gravel bar were performed to investigate the origins of SP signals at a restored river section of the Thur River in northeastern Switzerland. The SP mapping and subsequent inversion of the data indicate that the SP sources a

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41

Linde, N., J. Doetsch, D. Jougnot, et al. "Self-potential investigations of a gravel bar in a restored river corridor." Hydrology and Earth System Sciences Discussions 7, no. 6 (2010): 8987–9021. http://dx.doi.org/10.5194/hessd-7-8987-2010.

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Анотація:

Abstract. Self-potentials (SP) are sensitive to water fluxes and concentration gradients in both saturated and unsaturated geological media, but quantitative interpretations of SP field data are often hindered by the superposition of different source contributions and time-varying electrode potentials. Self-potential mapping and close to two months of SP monitoring on a gravel bar were performed to investigate the origins of SP signals at a restored river section of the Thur River in northeastern Switzerland. The SP mapping and subsequent inversion of the data indicate that the SP sources are

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42

Khan, A. A., and A. C. Chaterjee. "GEOMORPHOLOGY OF GARHWAL HIMALAYA, PARTS OF CHAMOLI TEHRI UTTAKASHI & PAURI UTTAR PRADESH (UTTRARKHAND) INDIA." International Journal of Advanced Research 10, no. 12 (2022): 1216–32. http://dx.doi.org/10.21474/ijar01/15960.

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Анотація:

The Geological and Geomorphological study in Upper Ganga basin has been attempted in parts of de Uttarkashi,Chamoli, Pauri and Tehri districts an area of 10000 Sq.kms in parts of QA sheet 53Jand 53 N on 1:50000 scale of Garhwal Himalaya U.P presently known as Uttrakhand State of Union of India. Out of total area of study, an area about 3500 sq.Kms has been selected for detailed Geological, Geomorphological and Sedimentological study. The area of Upper Ganga basin consisting of Alaknanda,Bhagirathi,Bhilangna, Nandakini, Mandakini, Pindar, Dhauli- Ganga Bal- Ganga , Madhmeshwar Ganga and Berhi G

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43

Patutin, Andrey V., Andrey N. Drobchik, and Yuri S. Zaharov. "DEVELOPMENT AND OPERATIONAL TESTING OF THE TOOL FOR TRANSPORTING DEVICES IN UNCASED BOREHOLES." Interexpo GEO-Siberia 2 (July 8, 2020): 148–52. http://dx.doi.org/10.33764/2618-981x-2020-2-148-152.

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Reducing the cost of conducting studies of the physical and filtration properties of unmined rocks at a considerable distance from the workings is an urgent task. Its solution will clarify the features of geological structure of the massif and optimize the mining scheme. The article presents the results of the development and operational testing of the tool for transporting measuring instruments along an uncased borehole drilled from underground working. The tool is based on a circuit with two pneumatic cylinders and a pneumatic control valve, the input of which is supplied with compressed air

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44

Liu, Xinxi, Yu Li, Fujun Zhao, Yanming Zhou, Weiwei Wang, and Shengnan Li. "Experimental Research on Mechanical and Energy Characteristics of Reinforced Rock under Dynamic Loading." Shock and Vibration 2019 (November 11, 2019): 1–11. http://dx.doi.org/10.1155/2019/4356729.

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The properties of anchored surrounding rock may vary considerably under complex geological and stress conditions, especially dynamic loading in deep mining. Therefore, comprehensive study of the reinforced mechanism is required to prevent failures associated with deep mining. In this paper, with sandstone as matrix and steel bar as bolt, the dynamic compression test of reinforced rock was carried out by using a 50 mm rod diameter split Hopkinson pressure bar (SHPB) test device. The mechanical and energy characteristics of reinforced rock under dynamic loading were analyzed. The results show th

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45

Lesmes, David P., Scott M. Decker, and David C. Roy. "A multiscale radar‐stratigraphic analysis of fluvial aquifer heterogeneity." GEOPHYSICS 67, no. 5 (2002): 1452–64. http://dx.doi.org/10.1190/1.1512745.

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The objective of this study is to use an integrated and multiscale exploration approach to quantify the geometrical parameters that are needed to predict block hydraulic conductivity tensors within fluvial deposits. We use 3‐D ground‐penetrating radar (GPR) data, electromagnetic (EM) surveys, resistivity soundings, and hand‐augered borings to characterize the 3‐D architecture of fluvial deposits on a floodplain of the Piscatiquis River, near South Sebec, Maine. Field‐scale surveys made across the entire floodplain were used to map the depth to the glacially eroded bedrock surface and the thick

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46

Heydarli, S. O. "Specification of structural-tectonic configuration and geological risks in the estimation of reserves in Darvin kupesi field." Azerbaijan Oil Industry, no. 03 (March 15, 2022): 4–9. http://dx.doi.org/10.37474/0365-8554/2022-03-4-9.

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Анотація:

Based on the newly drilled wells, the paper specifies structural-tectonic properties of Darvin kupesi field. Despite the long-term development of the field, numerous improvements have been revealed. New wells have been drilled during last years, on the basis of which geological structure of the field has been defined. Correlation schemes and geological profiles have been developed by means of new wells. Stratigraphic borders have been specified based on the correlation schemes. The structural map has been developed, the sites and forms of faults defined and the reserves by Girmaki suite and Lo

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47

Ding, Shuhui, Jindong Bai, Jingliang Han, Haixia Wang, and Fai Ma. "Mechanical Characteristics Analysis and Structural Optimization of Key Component of Self-Moving Temporary Support." Applied Sciences 12, no. 21 (2022): 10745. http://dx.doi.org/10.3390/app122110745.

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In order to prevent a roof fall accident of a coal mine roadway mining face, temporary support must be provided before the permanent support of the roadway. At present, the commonly used forepoling bar support has poor reliability and low efficiency, and other machine-mounted or self-moving temporary supports are also difficult to use widely due to the complex geological conditions and limited working space at the heading face. On the basis of the mechanical characteristics analysis and numerical simulation of the wall rock support system, we propose a temporary support scheme that can adapt t

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48

Lowell, G. R., and M. Ahl. "Chemistry of dark zinnwaldite from bom futuro tin mine, Rondônia, Brazil." Mineralogical Magazine 64, no. 4 (2000): 699–709. http://dx.doi.org/10.1180/002646100549553.

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Анотація:

AbstractPhysical and chemical properties of lustrous black mica from greisen veins at the Bom Futuro tin mine indicate that it is a relatively Fe-F-rich, Li-poor zinnwaldite with a composition near the midpoint of the polylithionite-siderophyllite join. On the basis of 22 oxygens, the mica contains 1.28–1.73 atoms of Li with an average octahedral occupancy of 5.61 and a filled interlayer site. Compositional variation reflects the net effects of alteration, coupled tetrahedral-octahedral substitutions, and petrogenetic factors related to vein fluid chemistry. Geological constraints and composit

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49

Patra, Punyatoya, and Roshani Devi. "Assessment, prevention and mitigation of landslide hazard in the Lesser Himalaya of Himachal Pradesh." Environmental & Socio-economic Studies 3, no. 3 (2015): 1–11. http://dx.doi.org/10.1515/environ-2015-0062.

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Abstract Landslides are destructive geological processes that have globally caused deaths and destruction to property worth billion dollars. Landslide occurrences are widespread and prolific in India covering more than 15 per cent of the total area. These are mostly concentrated in the Himalayan belt, parts of Meghalaya Plateau, Nilgiri Hills, Western and Eastern Ghats. The slope failure in the hilly terrain is due to geological processes and events. The frequency and magnitude of slope failure also increased due to anthropogenic activities such as road construction, deforestation and urban ex

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50

Wang, Hui Yong, Yun Yin Zhang, and Ming You Tan. "Application of Seismic Prediction Technique on Complex Lithological Reservoir in SL Oilfeild." Advanced Materials Research 1010-1012 (August 2014): 1763–67. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1763.

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In recent years, the proven reserves of lithological reservoirs account for a little more than two-thirds of the total proven reserves in SL Oilfield. The seismic predication technique as the key exploration method of lithological reservoirs focuses on identifying and describing reservoirs, especially on sand bodies. For the lacustrine faulted basin with various complex lithological reservoirs, based on the different geological characteristics of the reservoirs, a series of techniques suitable for channel sand, sandy conglomerate, turbidite and beach bar reservoirs have been developed and appl

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